A tendon in the left neck with shoulder pain, may be due to sleeplessness, local fasciitis, cervical spondylosis caused by local inflammation and edema, according to the cause of the general treatment, physiotherapy, drug treatment, surgical treatment. 1. Falling pillow: due to prolonged neck muscles in a state of tension leading to neck and shoulder pain, need to pay attention to warmth, can choose physical therapy, such as acupuncture, acupuncture can inhibit the transmission of pain to the central nervous system, promote the secretion of analgesic substances, so as to achieve the purpose of pain relief. 2. Fasciitis: due to a variety of reasons resulting in aseptic inflammation of the local fascia, you can choose to expand the local capillaries with hot compresses to promote inflammation, edema, accelerate the regeneration of tissues to alleviate pain, or the use of non-steroidal anti-inflammatory drugs, such as ibuprofen tablets, but may cause stomach discomfort, nausea, dizziness, headache and other adverse reactions, allergy, pregnant women, lactating women are prohibited. 3. Cervical spondylosis: pain and discomfort caused by pressure on nerves, muscles and blood vessels due to abnormalities in the tissue structure of the neck, pain can be improved by massage and traction. Oral ibuprofen and other non-steroidal anti-inflammatory analgesic drugs, if the structural abnormality is more serious, you can choose surgical treatment. If you suddenly have severe pain in one side of the neck and shoulder, it is recommended that you go to the hospital for a clear diagnosis and follow the doctor’s instructions, do not blindly use medication.